<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"
        integrity="sha384-xOolHFLEh07PJGoPkLv1IbcEPTNtaed2xpHsD9ESMhqIYd0nLMwNLD69Npy4HI+N" crossorigin="anonymous">
    <script src="https://cdn.bootcdn.net/ajax/libs/dayjs/1.11.7/dayjs.min.js"></script>
    <style>
        .red {
            color: red;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="container">
            <!-- 顶部搜索框模块 -->
            <div class="form-group">
                <div class="input-group">
                    <h4>品牌管理</h4>
                </div>
            </div>

            <!-- 数据表格 -->
            <table class="table table-bordered table-hover mt-2">
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>资产名称</th>
                        <th>价格</th>
                        <th>创建时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr v-for="item in list" :key="item.id">
                        <td> {{item.id}} </td>
                        <td> {{item.name}} </td>

                        <!-- 如果价格超过100，就有red这个类 -->
                        <td :class="{ red: item.price > 100}"> {{item.price}} </td>
                        <td>{{dateFormate(item.time)}} </td>
                        <td><a href="#" @click.prevent="fn(item.id)">删除</a></td>
                    </tr>
                    <tr style="background-color: #EEE">
                        <td>统计</td>
                        <td colspan="2">总价: {{ allPrice }}</td>
                        <td colspan="2">均价: {{ avgPrice }}</td>
                    </tr>
                </tbody>
                <tfoot>
                    <tr>
                        <td colspan="5" style="text-align: center" v-show="list.length <= 0">暂无数据</td>
                    </tr>
                </tfoot>
            </table>

            <!-- 添加资产 -->
            <form class="form-inline">
                <div class="form-group">
                    <div class="input-group">
                        <input type="text" class="form-control" placeholder="资产名称" v-model.trim="name" />
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <div class="form-group">
                    <div class="input-group">
                        <input type="text" class="form-control" placeholder="价格" v-model.number="price"/>
                    </div>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;
                <!-- 阻止表单提交 -->
                <button class="btn btn-primary" @click.prevent="getFn">添加资产</button>
            </form>
        </div>
    </div>

    <script>
        const app = new Vue({
            el: '#app',
            data: {
                id: 100,
                name: "", // 名称
                price: '0', // 价格
                list: JSON.parse(localStorage.getItem('list'))  || []
                // list: [
                //     { id: 100, name: "外套", price: 199, time: new Date('2010-08-12') },
                //     { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01') },
                //     { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22') },
                //     { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12') }
                // ]
            },
            methods: {
                // 删除
                fn(id) {
                    this.list = this.list.filter(item => item.id !== id)
                },
                // 增加

                getFn() {
                    if (this.name === '') return alert('不能为空')
                    if (this.price === '') return alert('价格不能为空')
                    this.list.push({
                        id: this.id + this.list.length,
                        name: this.name,
                        price: this.price,
                        time: +new Date()
                    })
                    this.name = '',
                    this.price = ''
                },
                // 时间格式化
                dateFormate(value) {
                    return dayjs(value).format("YYYY-MM-DD")
                }
            },
            computed: {
                allPrice() {
                   return this.list.reduce((sum, item) => sum + item.price, 0)
                },
                avgPrice(value) {
                   return (this.allPrice / this.list.length)
                }
            },
            watch: {
                list: {
                  deep: true,
                  handler(value) {
                    localStorage.setItem('list', JSON.stringify(value))
                  }
                }
            }
        })
    </script>
</body>

</html>